Unlike people, sharks don’t enter an unconscious state while sleeping. Instead they go into little-understood rest periods.
A nursery in the waters of New York is critical to the survival of the area’s sand tiger sharks, and scientists are now tagging these and other species to learn more about their needs.
Take a look at these sharks exploring the nooks and crannies in oceans around the world.
Source : Watch Our Favorite Shark Videos
Sharks, marine scientists say, are often misunderstood, described as ravenous man-eaters. In reality, sharks are critically important to the health of the world’s oceans.
A third of the marine megafauna is thought to have disappeared 2-3 million years ago.